Maxim MAX9835x Audio Amplifiers

Maxim Integrated's MAX98355A/MAX98355B Audio Amplifiers are digital pulse-code modulation (PCM) input Class D power amplifiers that provide Class AB audio performance with Class D efficiency. Both the MAX98355A and MAX98355B ICs from Maxim are supported by a highly flexible digital audio interface, with the MAX98355A supporting I²S data, the MAX98355B supporting left-justified data, and both ICs supporting time division multiplexed (TDM) data. Five selectable gain settings (3dB, 6dB, 9dB, 12dB, and 15dB) set by a single gain-select input (GAIN) are available with the MAX98355A and MAX98355B ICs, and the digital audio interface accepts sample rates ranging from 8kHz to 96kHz for all supported data formats. These flexible ICs eliminate the need for the external MCLK signal that is usually needed for PCM communication, thus reducing EMI and possible board coupling issues as well as reducing the size and pin count of the ICs. The MAX98355 Evaluation Kit(EV), a fully assembled and tested PCB that evaluates the MAX98355 PCM digital input Class D power amplifier, operates from a single 2.5V to 5.5V DC power supply and can deliver 3.2W into a 4Ω load.

MAX98355A/B IC Features

Single-supply operation (2.5V to 5.5V)

3.2W output power into 4Ω at 5V

2.2mA quiescent current

92% efficiency (RL=8Ω, POUT=900mW, VDD=3.7V)

25µVRMS output noise (AV=15dB)

Low 0.013% THD+N at 1kHz

No MCLK required

Sample rates of 8kHz to 96kHz

Supports left, right, or (left + right)/
2 outputs

Sophisticated edge rate control enables filterless Class D outputs

77dB PSRR at 217Hz

Low RF susceptibility rejects TDMA noise from GSM radios

MAX98355 Evaluation Kit Features

2.5V to 5.5V single-supply operation

Only a single external component (VDD capacitor) required in many applications

Maxim Integrated's MAX98356 PDM Input Audio Amplifier is a
digital pulse-density modulated (PDM) input Class D power amplifier that
provides Class AB audio performance with Class D efficiency. The
MAX98356 Audio Power Amplifier from Maxim takes a stereo pulse density
modulated (SPDM) input signal directly into the DAC and can be
configured to produce a left channel, right channel, or (left + right)/2
output from the stereo input data. This IC features an extremely robust
digital audio interface with very high wideband jitter tolerance (12ns
typ) on PDM_CLK. The MAX98356 offers five selectable gain settings
(3dB, 6dB, 9dB, 12dB, and 15dB) set by a single gain-select input (GAIN)
and is available in a 9-pin WLP package (1.345mmx1.435mmx0.64mm).
Other MAX98356 features include 2.5V to 5.5V single supply voltage
operation, 3.2W output power into 4Ω at 5V, and operating temperature
range -40ºC to +85ºC. The MAX98356 Evaluation Kit is a fully assembled
and tested PCB that evaluates the MAX98356 PDM digital input Class D
power amplifier. The MAX98356 Evaluation Kit operates from a single 2.5V
to 5.5V power supply and is capable of delivering 3.2W into a 4Ω load with either filterless Class D outputs or with an optional Class D filter that eases evaluation.

MAX98355 Evaluation Kit

MAX98355 Evaluation Kit (EV), a fully assembled and tested PCB that evaluates the MAX98355 PCM digital input Class D power amplifier, operates from a single 2.5V to 5.5V DC power supply and can deliver 3.2W into a 4Ω load.

MAX98355 Evaluation Kit Features

2.5V to 5.5V single-supply operation

Only a single external component (VDD capacitor) required in many applications

MAX98356 Evaluation Kit

MAX98356 Evaluation Kit is a fully assembled
and tested PCB that evaluates the MAX98356 PDM digital input Class D
power amplifier. The MAX98356 Evaluation Kit operates from a single 2.5V
to 5.5V power supply and is capable of delivering 3.2W into a 4Ω load with either filterless Class D outputs or with an optional Class D filter that eases evaluation.

MAX98356 Eval Kit Features

2.5V to 5.5V single-supply operation

Only a single external component (VDD capacitor) required in many applications